We present a comparative study of the growth of the technologically highly relevant gate dielectric and encapsulation material aluminum oxide in inorganic and also organic heterostructures. Atomic force microscopy studies indicate strong similarities in the surface morphology of aluminum oxide films grown on these chemically different substrates. In addition, from X-ray reflectivity measurements we extract the roughness exponent \beta of aluminum oxide growth on both substrates. By...
Source: http://arxiv.org/abs/0711.5019v1

This article is from PLoS ONE , volume 9 . Abstract Neolithic and Bronze Age topsoil relicts revealed enhanced extractable phosphorus (P) and plant available inorganic P fractions, thus raising the question whether there was targeted soil amelioration in prehistoric times. This study aimed (i) at assessing the overall nutrient status and the soil organic matter content of these arable topsoil relicts, and (ii) at tracing ancient soil fertilizing practices by respective stable isotope and...
Source: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4152168

The optical properties of pentacene (PEN) and perfluoropentacene(PFP) thin films on various SiO2 substrates were studied using variable angle spectroscopic ellipsometry. Structural characterization was performed using X-ray reflectivity and atomic force microscopy. A uniaxial model with the optic axis normal to the sample surface was used to analyze the ellipsometry data. A Strong optical anisotropy was observed and enabled the direction of the transition dipole of the absorption bands to be...
Source: http://arxiv.org/abs/0707.3768v1

We show that the thermal stability of thin films of the organic semiconductor diindenoperylene (DIP) can be strongly enhanced by aluminum oxide capping layers. By thermal desorption spectroscopy and in-situ X-ray diffraction we demonstrate that organic films do not only stay on the substrate, but even remain crystalline up to 460C, i.e. 270 deg. above their desorption point for uncapped films (190C). We argue that this strong enhancement of the thermal stability compared to uncapped and also...
Source: http://arxiv.org/abs/cond-mat/0407588v1

Stellar activity may induce Doppler variability at the level of a few m/s which can then be confused by the Doppler signal of an exoplanet orbiting the star. To first order, linear correlations between radial velocity measurements and activity indices have been proposed to account for any such correlation. The likely presence of two super-Earths orbiting Kapteyn's star was reported in Anglada et al. (2014, MNRAS 443L, 89A), but this claim was recently challenged by Robertson et al. (2015, ApJ...
Topics: Earth and Planetary Astrophysics, Instrumentation and Methods for Astrophysics, Astrophysics
Source: http://arxiv.org/abs/1506.09072

Exoplanets of a few Earth masses can be now detected around nearby low-mass stars using Doppler spectroscopy. In this paper, we investigate the radial velocity variations of Kapteyn's star, which is both a sub-dwarf M-star and the nearest halo object to the Sun. The observations comprise archival and new HARPS, HIRES and PFS Doppler measurements. Two Doppler signals are detected at periods of 48 and 120 days using likelihood periodograms and a Bayesian analysis of the data. Using the same...
Topics: Instrumentation and Methods for Astrophysics, Earth and Planetary Astrophysics, Astrophysics of...
Source: http://arxiv.org/abs/1406.0818

LabPlot is a KDE-application for interactive graphing and analysis of scientific data. LabPlot provides an easy way to create, manage and edit plots and to perform data analysis. Available for Linux, Windows and Mac OS X.
Topic: scientific graphing

LabPlot is a KDE-application for interactive graphing and analysis of scientific data. LabPlot provides an easy way to create, manage and edit plots and to perform data analysis. Features General Project based management of data Tree-like organization (parent-child hierarchy) of created object, navigation is done in Project Explorer Folders and sub-folders within the project for a better object management Spreadsheet and Matrix – data-container serving as the data source used in data analysis...
Topics: plotting, data analysis, scientific graphing

Stellungnahme des Berliner Alternativen Geschichtsforums. Veröffentlicht auf der Website der Linken.
Topics: SED, PDS, DIE LINKE, DDR, Berlin, Bundesbeauftragte für Kultur und Medien